Ex1800T Firmware
CVE-2023-52026
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK
2 techniques across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 3.58%. |
| Exploit ScenarioDerived | A remote attacker could execute arbitrary operating system commands on the host by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAIv1 – Mar 28, 2026
TOTOlink EX1800T V9.1.0cu.2112_B20220316 was discovered to contain a remote command execution (RCE) vulnerability via the telnet_enabled parameter of the setTelnetCfg interface. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Earlier versions of this analysis (1)
Command injection in TOTOlink EX1800T.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. TOTOlink EX1800T V9.1.0cu.2112_B20220316 was discovered to contain a remote command execution (RCE) vulnerability via the telnet_enabled parameter of the setTelnetCfg interface Affected products include: Totolink Ex1800T Firmware.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
TOTOlink EX1800T V9.1.0cu.2112_B20220316 was discovered to contain a remote command execution (RCE) vulnerability via the telnet_enabled parameter of the setTelnetCfg interface
Executive ViewAI
Organizations using TOTOlink EX1800T V9.1.0cu.2112_B20220316 face critical risk from CVE-2023-52026, a OS command injection vulnerability rated CVSS 9.8. Successful exploitation could allow attackers to execute arbitrary code or commands on affected systems, potentially leading to full system compromise. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Deploy WAF rules to block injection patterns; (2) Restrict network access to affected components; (3) Enable enhanced logging for suspicious activity.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
OS command injection occurs when an application passes unsanitized user input directly into system shell commands.
Affected Products (CPE)CVE.org
More in Ex1800T Firmware
View allTOTOLINK EX1800T V9.1.0cu.2112_B20220316 has a vulnerability in the apcliEncrypType parameter that allows unauthorized e
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘langFlag’ par
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘merge’ parame
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘langType’ par
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘key5g’ parame
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘opmode’ param
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the lanIp paramete
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the setRebootScheC
TOTOLINX EX1800T v9.1.0cu.2112_B20220316 is vulnerable to arbitrary command execution in the ‘enable parameter’ of the s
TOTOLINK EX1800T V9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the lanSecDns para
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the lanNetmask par
TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the lanGateway par
GitHub PoC
Exploit-DB